A research professor who was Niju Menso's supervisor in Niju Menso's days as a scientist. Though he warns Chiko against trusting Niju Menso, he is actually obsessed with obtaining Niju Menso's legacy as a researcher and reaching the "fourth state of water". He does not care for the consequences and believes that the dangerous power of the fourth state of water will change the world, no matter how destructive it is. He also used Seiji Tamiya's research to create enhanced cybernetic bodies for himself and others, eventually changing his body in the image of Niju Menso. Kakihara was the original Niju Menso, but Niju Menso's thefts began occurring at the same time and the name became attached to the young scientist while Kakihara was forgotten. He is without morals and seeks only to complete the research Niju Menso conducted before the war, believing the research was selfishly kept from him, and had killed many people over the years to obtain it.